Pressboard



.ufff/12255 Dec. 23, 1930. G, K, LEwls 1,786,211

' PRESS BOARD Filed oct. 18, 1928 Patented Dec. 23, 1930 UNITED STATESPATENT OFFICE GEORGE K. LEWIS, 011 CI-IICAGrO, ILLINOIS, ASSIGNOR TOMET-L-WOOD CORPORATION, F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOISPRESSBOARD Application led October 18, 1928. Serial No. 313,240..

This invention relates to press boards for use in book-binding.

In finishing books, a final operation consists in placing the booksbetween boards designed for the purpose and inserting the same into asuitable press, the boards being provided with beads along their edgesadapted to engage the books to emphasize the groove' portions intendedto form the l) hinge connections with the backs of the books. Heretoforesuch boards have been of Wood and on account of the heavy stresses towhich they are subjected in use, necessarily have been of excessivethickness to resist the l5 stresses imposedv thereon,'and consequentlytake up much more space than is convenient or desired.

An object of the present invention is to provide a pressboard of thischaracter made 2@ up of laminations of steel and wood affordingexceptionally great strength with very small thickness, as compared tothe press boards now in use. l I y A further object of the invention isto provide a laminated board of the character referred to, in whichsteel veneers form the outer-most laminations of the board, and theedges of the board so constructed as to provide the required bead'inainovel and effecso tive manner. Y

Still another object of the invention is to provide a headedconstruction along the edges of the boards wherein the veneers at theopposite side-s of the board are utilized in forming the beads, and areso connected as to provide a reinforced` bead and edgel construction forthe board.

Other and further objects of the inven tion willmore fully appear fromthe descri 4 tion and claims hereinafter appearing'.

In the drawings forming a part of this invention, Figure 1 is a planview of a press board embodying my invention. VFigure 2 is a fragmentarysectional view through one 7 edge of the board, said view correspondingsubstantially to the line 2-2 of Figure 1.v

Figure 3 is a fragmentary prospective view of a corner portion of theboard showing the angle brackets used in connection therewith.

Figure 4 is al fragmentary sectional view similar to Figure 2, anddisclosing a somewhat dierent embodiment of the invention. Figure 5 is asectional view similar to Figure et showing still another embodiment ofthe invention. Figure 6 is a sectional edge view showing anotherembodiment of the inven-v tion. And Figure 7 is a fragmentary verticalsectional view through a pair of boards, showing the manner of use inconnection with a book to be operated upon.

As shown in the drawings, the press board embodied in my inventioncomprises a body portion made up of a plurality of layers of plywood,indicated at 10, and opposite layers 11 and 12 of sheet steel.Interposed between the layers 11 and 12 and the body portion 10 arefabric sheets 13, preferably of a fuzzy surface texture flannel,adhesive being interposed between the body portion, the,

fabric sheets, and the metallic sheets, for the purpose o-f permanentlybonding the layers together in a series of laminations forming' acomposite panel, relatively thin, but of great strength.

' Along the marginal edge of each surface of the board is provided abeadindicated by the numerals 14 and 15. These beads are formed by turningup a iange portion 16 along the marginal edge of each of the steelsheets 11 and 12, which portions co-operate with a connecting strip 17to complete the bead, and finish and reinforce the edge construction ofthe panel. rPhe connecting strip 17 is preferably in a single piece, andformed to flt along the four edges 0f the board, and is substantially ofchannel shape for this purpose. The web 18 of the channel shape liesalong the edge of the board, while the flanges are crimped over themarginal flanges 16' of the sheets 11 and 12, as clearly shown in Figure2, the-franges forming the bead proper, while the web of the channelshape connects the edges of the two steel sheets in such manner that thestrip reinforces the construction throughout, the' web-18 being disposedat right angles to the pressure applied to the board, and the bead beingreinforced by the out-turned marginal flange portions on the metallicsheets. The strip 17 at each corner is preferably depressed for thereception of the legs of an angle bracket 190 as best shown in Figure 3.The legs of the angle bracket lie within the depressed portions, andscrews are extended through said legs, through the strip 17, and intothe body portion. All of the four edges of the board are of the sameconstruction shown in section in Figure 2.

Through the provision of a press board of this characti", comprisinglaminations of steel and wood, great strength is assured, and a minimumthickness obtained; also the necessary bead formation is provided by areinforced edge construction which serves to finish the edges of theboard and reinforce the bead. By the use of press boards of thecharacter described, a great amount of space` is saved with no loss instrength, and the beaded construction is of a strong and durablecharacter.

In Figure 4 there is shown a somewhat different embodiment of theinvention, wherein .the metallic veneers 19 and 2O are formed adjacenttheir marginal portions with integral off-set beads 200 and 210, theportions of the veneers outward of the beads, and indicated at 22 and23, being relied upon to connect the veneers and finish the edge of theboard. The marginal portion 22 is off-set as indicated at 24 so as tolap beneath the adjacent edge of the marginal portion 23, theoverlapping portions being sealed and secured with solder. Although onlyone edge of the board has been described, it will be appreciated thatall four edges of the press board, such as that shown in Figure l, willbe of like construction.

In Figure 5 the marginal portions 26 and 27, instead of having theiredges overlapped are turned inwardly as indicated at 29 so as to beembedded in the body portion of the board, the marginal portions 29being soldered together. Referring to Figure (i, a body portion 30 andveneers 3l and 32 are disclosed, the veneers along their marginalportions being beaded as indicated at 34 and 35, and insert strip 3G isaccommodated within the beaded portions, and the flanges of the veneersbeyond the bea ded portions are secured to the strip by solder.

All of the constructions described have a marked advantage over thepress boards as ordinarily provided in affording increased strength witha` great decrease in thickness, and the reinforced beaded constructionalong the edges of the board serve not only to pro; vide the necessarybeading, but also to connect the metallic veneers of the board andpresent a smooth and finished appearance whereby the board may bereadily manipulated and the presence of raw or unfinished edges avoided.

While I have herein shown and described what I consider the preferredmanner of carrying out the invention, the same is merely illustrative, Icontemplate all changes and modifications which come within the scope ofthe claims appended hereto.

I claim l. A press board made up of a plurality of laminations offibrous material and metal, the metallic laminations being disposed toform the exterior' surfaces of said board; and means including portionsof said metallic laminations, providing a beaded construction along themarginal edge of said board.

2. A composite board of the character indicated, comprising a pluralityof laminations of fibrous material and metal, the metallic laminationsbeing disposed at the exterior surfaces of said boa-rd, the marginaledges of said metallic laminations being offset and connected to providea reinforced edge construction, said edge construction having portionsformed to provide a bead along the marginal surface of the board.

8. A board of the character described comprising a fibrous body portionand exterior veneers of sheet metal, the marginal edges of said sheetmetal veneers being off-set to provide beads and means connecting theends of said metallic veneers along' the edges of said board.

4. A board of the character described comprising a plurality oflaminations of fibrous material and metal, the metallic laminationsadjacent their marginal edges being provided with a beaded constructionincluding off-sets in the metallic laminations, and connecting stripssecured to the off-set portions of said metallic laminations.

5. A board of the character described comprising a plurality oflaminations of fibrous material and metal, the metallic laminationsadjacent their marginal edges being provided with a beaded constructionincluding off-sets in the metallic laminations, and connecting stripssecured to the off-set portions of said metallic laminations, said stripbeing disposed at right angles to the main plane of said board.

6. A press board of the character described comprising a fibrous bodyportion and exterior veneers of metal, the marginal edges of saidveneers being connected together' by a soldered joint, and portions ofsaid veneers being off-set and formed into beads.

7. In a press board of the character described, al relatively thick bodyportion of fibrous material, and outer surface layers of relatively thinmetal secured fiatwise to the body portion, and a metallic edgingconnecting the metal surface layers and extending outwardly therefrom tofurnish a marginal bead.

8. In a press board of the character described, a relatively thick bodyportion of fibrous material, and outer surface layers of relatively thinmetal secured fiatwise to the body portion, and an integrally formedmetallic edging connecting the metal surface layers and extendingoutwardly therefrom to furnish a marginal bead.

9. In a press board of lthe character described, a relatively thick bodyportion of fibrous material, and outer surface layers of relatively thinmetal secured fiatvvise to the body portion, and an integrally formedmetallic edging connectingthe metal surface layers and offset outwardlyfrom one of the metallic layers to form a marginal bead.

10. In a press board of the character described, including a cornerportion, a relatively thick body portion of fibrous material, and outersurface layers of relatively thin metal secured fiatwise to the bodyportion, and a metallic edging connecting` the metal surface layers andoffset outwardly from one of the metallic layers to form a marginalbead, the edging being recessed in the region adjacent to the corner,and a corner bracket lying in said recess and. secured to said corner.

In Witness that I claim the foregoing I have hereunto subscribed my namethis 10th day of October, 1928.

Gr. K. LEI/VIS.

